XML 24 R56.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stock Options And Employee Stock Purchase Plan (Restricted Stock) (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Compensation cost recognized $ 2,335,000 $ 2,155,000 $ 4,683,000 $ 4,448,000  
Allocated Share-based Compensation Expense 2,335,000 2,155,000 4,683,000 4,448,000  
Restricted Stock And Restricted Stock Unit (RSU) [Member]
         
Compensation cost recognized 1,700,000 1,100,000 3,200,000 2,100,000  
Allocated Share-based Compensation Expense 1,700,000 1,100,000 3,200,000 2,100,000  
Unrecognized compensation cost related to non-vested awards granted 19,300,000   19,300,000   16,000,000
Restricted Stock [Member]
         
Shares, Nonvested at January 1, 2013     828,475    
Shares, Granted     170,930    
Shares, Vested     (255,541)    
Shares, Canceled     (37,400)    
Shares, Nonvested at June 30, 2013 706,464   706,464    
Weighted-Average Grant-Date Fair Value, Nonvested at January 1, 2013     $ 23.08    
Weighted-Average Grant-Date Fair Value, Granted     $ 40.08    
Weighted-Average Grant-Date Fair Value, Vested     $ 20.33    
Weighted-Average Grant-Date Fair Value, Canceled     $ 23.51    
Weighted-Average Grant-Date Fair Value, Nonvested at June 30, 2013 $ 28.16   $ 28.16    
Weighted-average period to recognize compensation cost (in years)     2 years 11 months 9 days    
Restricted Stock Units (RSUs) [Member]
         
Shares, Nonvested at January 1, 2013     115,466    
Shares, Granted     6,675    
Shares, Vested     (8,716)    
Shares, Canceled     (33,000)    
Shares, Nonvested at June 30, 2013 80,425   80,425    
Share Based Compensation Equity Awards Other Than Options Expected To Vest Shares     54,961    
Weighted-average period to recognize compensation cost (in years)     3 years 8 months 9 days    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms     2 years 4 months 6 days    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Weighted Average Remaining Contractual Term     2 years 1 month 10 days    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Intrinsic Value 2,336,374   2,336,374    
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Outstanding, Aggregate Intrinsic Value $ 3,418,867   $ 3,418,867